摘要:
The invention relates to a modified diene elastomer comprising a majority of the species functionalised in the middle of the chain by an alkoxysilane group, optionally partially or completely hydrolysed to silanol, having a tertiary amine function and whereof the silicon atom bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalised at least at 70 mol%, relative to the number of moles at the end of the chain, by an amine function.
摘要:
The present invention relates to a modified diene elastomer made up of: a) at least 55 wt%, relative to the total weight of the modified diene elastomer, of a species coupled by a functional group having a function with formula -SiOR, in which R is a hydrogen atom or alkyl radical, and optionally another function able to interact with a reinforcing filler, b) 5 wt% to 30 wt%, relative to the total weight of the modified diene elastomer, of a star species having three elastomer branches connected to a same silicon atom belonging to a functional group that may or may not have a function able to interact with a reinforcing filler, c) a level of less than or equal to 15 wt%, relative to the total weight of the modified diene elastomer, of a species functionalised at the end of the chain by a functional group having a -Si(OR) 2 function, in which R is a hydrogen atom or an alkyl radical, and optionally another function able to interact with a reinforcing filler, and d) a level of less than or equal to 15 wt%, relative to the total weight of the modified diene elastomer, of a non-functional diene elastomer. This elastomer makes it possible to optimise the compromise between the creep of the elastomer and the hysteresis of the rubber composition containing it, which is fully satisfactory for use in tyre manufacturing.
摘要:
The invention relates to a novel polyphosphorus polymer that is thiol-functionalised at the chain ends, of which the polymer chain comprises units bearing at least one phosphonate pendant functional group and/or at least one phosphonic pendant functional group along the length of the chain. This novel polymer is particularly suitable for use in a thiol-ene coupling reaction. This provides the possibility of grafting the polyphosphorus polymers to diene polymers for example.
摘要:
The present invention relates to a modified diene elastomer comprising a majority of a species coupled by a carrier group with a function comprising a primarily silanol-hydrolysed silicon atom and an amine function, bonded to the diene elastomer by the silicon atom and its synthesis process. This elastomer has the particularity of not undergoing an evolution of the Mooney viscosity when it is stored.
摘要:
The invention relates to a modified diene elastomer comprising a majority of the species functionalised in the middle of the chain by a silanol group, the silicon atom of which bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalised at least at 70 mol%, relative to the number of moles at the end of the chain, by an amine function.
摘要:
The invention concerns a modified diene elastomer comprising: a) at least 70% by weight, relative to the total weight of the modified diene elastomer, of a diene elastomer functionalised at one chain end with a silanol function or a polysiloxane block having a silanol end and having a polymolecularity index before functionalisation less than or equal to 1.6, b) more than 0 and up to 30% by weight, relative to the total weight of the modified diene elastomer, of a star-branched diene elastomer having a polymolecularity index before star-branching less than or equal to 1.6, the Mooney viscosity of said modified diene elastomer varying from 30 to 80.
摘要:
The invention relates to a method for the synthesis of a novel diene polymer with a high content of phosphorus functional groups by means of the radical grafting of a poly(phosphorus) polymer bearing a chain-end thiol functional group to a diene polymer according to the following steps: a) at least one diene polymer in solution and at least one poly(phosphorus) polymer bearing a chain-end thiol functional group in solution are brought into contact under agitation; b) the homogenous reaction mixture obtained in the preceding step is heated to the temperature of the grafting reaction; and c) the radical initiator is added during step (a) or (b) or once the grafting reaction temperature has been reached.
摘要:
The invention relates to a modified diene elastomer predominantly comprising the species functionalised in the middle of the chain by an alkoxysilane group, optionally partially or completely hydrolysed to silanol, having an epoxide function and whereof the silicon atom bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalised at least at 70 mol%, relative to the number of moles at the end of the chain, by an amine function.
摘要:
The invention relates to a triblock diene elastomer where the central block is a polyether block with a number average molecular mass of between 150 and 5000 g/mol and is connected to each of the side blocks by a silicon atom, and at least 70 molar % of the chain ends, in relation to the number of moles at the end of the chain, is functionalised by an amino function.
摘要:
The present invention relates to a continuous synthesis method for a diene elastomer incorporating a step for modifying the diene elastomer in a functionalisation device, said step being characterised by: - a kinetic model according to which the ratio of the kinetic constants is greater than 1, and - a flow reflected by a residence time distribution in the functionalisation device expressed according to equations 1 or 3: (i) in a functionalisation device with at least one tubular continuous reactor or with at least one cascade of at least two stirred reactors (Eq. 1), (ii) in a functionalisation device that is a combination of device (i) and a device with at least one continuous stirred reactor, having a residence time distribution characterised by the following equation (Eq. 2), the device (ii) having a residence time distribution characterised by the following equation 3, which is the result of the convolution of equations 1 and 2 (Eq. 3).